Speed-changing device.



JQW. EDGAR.

SPEED CHANGING DEVICE.

APPLICATION FILED MAE. 9, 1912.

1,064, 1 99 Patented June 10, 1913.

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*JIW. EDGAR. SPEED CHANGING DEVICE. APPLIGATIOH FILED MAR.9,1 912. l gg lgg Patented June 10, 1913.

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WEISE' m: mv g SJ 140M012 i S ATES PATENT ()FFIGE. JAMES w. Eritrea, or iyionaue irm, scorn DAKIQTA. srnnb-oriaiverive nnvron.

1,96% 1:99. Specification of Letters Patent- Patented June 10, 1913,- Application filed March 9, 15112; $eria1 No. 682,637.

Tb all whom it may c oizc em: and carries a beveled gear 9 which his it known that 1, JAMES W EDGAR, a or otherwise secured upon said shaf. cit zen pf the United States, residing at Mc- Upon the transnnssion shaft 6 a gear 10 aughlin, n the county of Corson and State is loosely mounted between collars ll fixed is keyed 5 of South Dakota, have invented certain new upon said shaft, said gear being provided pp d useful Impro ntsin$peed-Cha,nging upon one face with the clutch lugs 12. A' Devices, of which'the following is a specificlutch member 13 is also arranged upon said cation, reference being had to the accomdriving shaft and is keyed thereon as at 14 panying drawings. for longitudinal sliding movement. A, cog

1o This invention relates to improvements in or pin on 1,5 is loosely mountedv upon the 5,5 speed changing devices and has for its obtransmission shaft 6 between a collar on ject to provide a very siin le arrangement said Shaf and One end of he frame 5 and of transmission gears whereby rotation may is provided with the clutch lugs 16 on its be transmitted from the driving shaft to the Inner face, said sliding clutch member l3 l5 driven shaft at several different speeds, e ng disposed movement between the 79 A further and more specific object of the oppos d l h f s ofthe g ars Q a d 5 invention is to provide a device of this charrespectively. A gear 1? is ri idly keyed acter wherein the power transmitting gears upon th t a sm ss hflfi dl l l t0 th at all times remain in mesh, whereby a high opposite end of the frame 5.

' 20 degree of efticiency'and durability of the A driving gear 18 is keyed upon a slidin 7 device is assured. g clutch member 19, which n turn is A still further object of the invention is to upon the drive shaft 7 as shown at 20. Rev provide a speed transmission device of the 6 ed gears 21 are loosely ,Inounted upon the above character which may be inex ensively Shaft 7 and cooperate with the beveled manufactured, is reliable and e cient in teeth of the gear 9 at diametricallyo posite c practical operation and provides means PO IKS- he inn r' faces of these ,eveled whereby the speed of rotation of the driving gears are provided with c u h l g 22 with shaft may be easily and quickly changed. which similar lugs 23 on the ends of the With the above and other objects in view, thi mem er 19 cooperate. A cog gear 2d the invention consists of the novel features in eg ly formed i h one of the beveled ,8.5

of construction, combination and arrangeg a 21 n m h W h th g a 7 w i h A ment of parts hereinafter fully described S keyed 11 011 the tlensmlssion shaft. A and claimed, and illustrated in the accomgear 25 1s eyed upon the shaft 7 as at 26, pangxing drawings, in whiclsaid latter gear being independent of the Figure 1 is a top plan View of a speed other of h P11119113 gears 1- 'T is cog p changing device embodying the present ingear 25 meshes with the te h of th gear or vention, with clutches in neutral positions; p i p the nsm ssi n s aft- Fig. 2 is a similar view showing the transt ,Wlll H d a e movable gear-18 mission gears in position to operate the drivi 0f i nt l g t0 at 2111 times l' l ilill 4.0 ing shaft at a low speed; Fig. 3 is a similar 1 i h teeth of the ge 10 1 hfi g5 view showing the position of the gears for riving sh f in ts m vement between the high speed transmission; Fig. 4 is a section u h f s of the v d gears 21. To the taken on the line H of Fig. 3 5 and Fig. 5 clutch members 13 and 19 suitable o ,erating is a plan view illustrating a slightly inodilevers are connected. From the a oV.e ar- 115 fied formof the device. rangemcnt of elements, the operation of the 1 0 Referring in detail to the drawings and device will be understood as follows. more particularly to Figs. 1 to 4 thereof 5 hen it is desired to transmit rotation at designates a frame or ,case in which a driv-' low speed to the shaft 8, the clutch member ing shaft 7 is rotatably mounted and con- 19 remains at neutral position as shown in to nected to the shaft of the engine in any pre- Fig. 1 upon driving shaft 7. The clutch L ferred manner. A transmission shaft 6 is member 13 on the shaft 6 is Shifted to the also mounted in the case or frame 5 and left to engage the same with gear 10 thereby disposed in parallel relation to the shaft 7 locking said pinion or gear on the transmis; The driven sl aft'S jisjournaled at one end sio i shaft and transmitting power through as in one o t e. v ant id we r am th am an ha 6 t g ith g ars 17, no

shaft 8 at high speed,

2 d 521 to the beveled gear 9 on the shaft 8. fhis arrangement of the parts is illustrated in Fig. 2 of the drawings. When it is desired to transmit ower to the driven the clutch member 19 remains in neutral position upon shaft 7 and the operator shifts the clutch member 13 on the transmission shaft 6 to the right to engage the same with the gear 15, thus trans- 0 mitting power through the gear on the parted to the shaft 8 by shifting the clutch member 19 to the right to engage bevel pinion 21 and gear 9 to shaft 8.

In Fig. 5 I have shown a slightly modified form of. the invention wherein all of the sliding clutch members are arranged upon the shaft 7. On shaft 6 the spaced gears 27 and 28 are keyed, said gears being of different diameters. The beveled pinions' or gears 21 on the shaft 7 en age with the beveled gear 9 as in the pre erred form of the device and between these pinions two sliding clutch members 29 and 30 are arranged upon said shaft. These clutch members are adapted to co-act with each other and with the gears 21. One of the gears 21 is provided upon its outer face with clutch teeth as indicated at 21 with which the teeth of a short sliding clutch member 31 are adapted to engage. The other end of this clutch member is also provided with clutch teeth to co-act with the'teeth of a clutch element 32 which is rigidl keyed upon the shaft 7. In this modi ed construction, high speed may be transmitted from the shaft 7 to the shaft 8 by shifting the clutch members 31 to engage the clutch element 32 keyed upon the shaft 7, and

shifting the clutch member 29' out of engagement with the clutch 30 and into engagement with the left hand gear 21 thus freeing it from shaft 7. To obtain a low speed of the shaft 8, the clutch 31 is shifted into engagement with the gear 21 and the member 29 is shifted to engage the clutch ber 29, the clutch member 31 ,,lieing in a element, 39. An intermediate or medium speed is obtained bylmovin the member 29 to engage gear 21 and shifting the clutch member 30 into engagement with the memneutral position and loose n on shaft 7 From thaforegoing it is, elieved that the constructidn and manner of: operation of the invention in both of its forms will be clearly understood. It will be noted that inboth instances the transmission gears on the shaft 7 remain in permanent co-active engagement with the gears upon the trans mission shaft so that all liability of disengagement of said gears so that they cannot he again connected is prevented. In the ordinary gear transmission mechanism wherein the driving and transmission ears are shifted out of contact with each ot er, wear upon the gear teeth finally prevents their proper meshing engagement so that new gears must be provided.

The various parts of the device are of simple form and ma therefore be manufactured at small cost. and described the preferred construction and arrangement of the elements, it will be understood that they are susceptible of considerable modification without departing from the essential feature or sacrificing any of the advantages thereof.

Having thus described the invention what is claimed is 1. in a speed changing mechanism, parallel driving and transmission shafts, a driven shaft, a beveled gear fixed to the driven shaft, beveled gears loose upon the driving shaft engaging with the beveled gear at diametrically opposite points, additional gears upon the driving shaft, and gears on the transmission shaft permanently engaged While I have shown with the last named gears on the driving drive shaft between the first named gears, I

said gears having co-acting clutches Whereby said sliding gear may be moved into locking engagement with either of the first named gears, gears on the transmission shaft, gears arranged on said driving shaft permanently engaged with the latter gears, an additional gear on the transmission shaft permanently engaged with the sliding gear on said drive shaft and a clutch member on the transmission shaft to lock said latter gear thereon and transmit rotary'movement to said transmission shaft.

3. A speed changing mechanism comprising parallel driving and'transmission shafts, a driven shaft and a beveled gear fixedthereon, gears loosely mounted upon thh drive driving sha aged, ands; sliding'cluteh member on the 'iatter gears, 0ne of the ears on the transy mounted, another gear loosely mounted on the transmission mission shaft being loose shaft meshing with the sliding gear on the drive shaft, the {gears on the transmission ts being permanently enran'smission shaft to lock either of the loosely mounted gears thereon whereby power may be transmitted to the driven shaft at various speeds.

e, In a speedchanging mechanism, driving' and transmission shafts, a, driven shaft, a gear'on' the latter shaft, a gear loose on the driving'shaft meshing with the gear on the driven shaft, a sliding gear on the driving shaft, said loosely mounted gear and the sliding gear having clutch faces whereby the loose gear may be locked on the shaft, spaced pairs of fixed and loose intermeshing gears on the driving and transmission shafts, an additional gear'loosely'mounted upon the transmission shaft to permanently engage with said sliding gear, and a clutch member on the latter shaft cooperating with the loose gears thereon to look the same upon the said shaft to transmit'power to the driven shaft.

5. Ina speed changing mechanism, a driven shaft, driving and transmission shafts, a gear on the driven shaft, a gear loosely mounted on the driving shaft to mesh with the gear on the driven shaft, a sliding gear on the driving shaft, said gears having co-acting clutches whereby the loose gear may be locked on the shaft, a gearfixed upon the driving shaft, spaced gears having different diameters loosely mounted upon the transmission shaft and meshing with the sliding and fixed gears 11 on the driving shaft, additional intermes ing loose and fixed gears on the driving and transmission -shafts respectively, said latter gears diifering in diameter from said firstnamed gears, and a sliding clutch member arranged upon the transmission shaft to lock either of the loose gears thereon whereby power may be transmitted to the driven shaft at various speeds. In testimony whereof I hereunto affix my signature in the presence of two witnesses.

JAMES W. EDGAR. Witnesses:

W. DEAN HURLBUT, BEN MAJ HoR. 

